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mongodbmongoosemongodb-query
vashishth
vashishth

Reputation: 3370

Mongodb - remove or replace all array elements

How can i replace all elements from a mongodb array element. As in below example, my requirement is to remove both object from skills array and add new elements in it.

{
    "_id": "uniqueid",
    "skills": [
        { "skill": "dancer" },
        { "skill": "singer" }
    ]
}

I need to replace all element of skills array field. How this can be achieved using mongodb java driver, or other query types?

Upvotes: 0

Views: 1218

Answers (1)

Tarek Essam
Tarek Essam

Reputation: 4010

You just need to use $set operator $set to set skills to a new value which will be an array of the new element you want to replace with.

 db.collectionName.update(
   { _id: 'uniqueid' },
   { $set:
      {            
        skills: [{'new elements'}]
      }
   }
)

if you want to remove all elements set the skills to an empty array {skills: []}

if you want to remove a certain elements based on a value use $pull operator $pull

Upvotes: 2

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